US4676600A - Sound preventing means in sliding lens barrel and method of manufacture thereof - Google Patents
Sound preventing means in sliding lens barrel and method of manufacture thereof Download PDFInfo
- Publication number
- US4676600A US4676600A US06/718,123 US71812385A US4676600A US 4676600 A US4676600 A US 4676600A US 71812385 A US71812385 A US 71812385A US 4676600 A US4676600 A US 4676600A
- Authority
- US
- United States
- Prior art keywords
- machining
- sliding
- cylindrical surfaces
- lead angle
- machined
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Turning (AREA)
- Lens Barrels (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
Description
α.sub.1 >tan.sup.-1 L.sub.2 /πd.
Claims (8)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59063048A JPS60205518A (en) | 1984-03-30 | 1984-03-30 | Preventing device for slide noise of lens barrel |
JP59-63048 | 1984-03-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4676600A true US4676600A (en) | 1987-06-30 |
Family
ID=13218055
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/718,123 Expired - Lifetime US4676600A (en) | 1984-03-30 | 1985-03-29 | Sound preventing means in sliding lens barrel and method of manufacture thereof |
Country Status (4)
Country | Link |
---|---|
US (1) | US4676600A (en) |
JP (1) | JPS60205518A (en) |
DE (1) | DE3510093A1 (en) |
GB (1) | GB2157020B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4763987A (en) * | 1985-11-20 | 1988-08-16 | Minolta Camera Kabushiki Kaisha | Lens barrel |
US5016993A (en) * | 1987-10-02 | 1991-05-21 | Olympus Optical Company Ltd. | Zoom mechanism for zoom lenses |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3233514A (en) * | 1962-02-24 | 1966-02-08 | Schneider Co Optische Werke | Control mechanism for varifocal objective and the like |
US3876290A (en) * | 1973-12-05 | 1975-04-08 | Frank G Back | Rapid focusing varifocal lens assembly |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE299125C (en) * |
-
1984
- 1984-03-30 JP JP59063048A patent/JPS60205518A/en active Granted
-
1985
- 1985-03-20 DE DE19853510093 patent/DE3510093A1/en active Granted
- 1985-03-29 GB GB08508345A patent/GB2157020B/en not_active Expired
- 1985-03-29 US US06/718,123 patent/US4676600A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3233514A (en) * | 1962-02-24 | 1966-02-08 | Schneider Co Optische Werke | Control mechanism for varifocal objective and the like |
US3876290A (en) * | 1973-12-05 | 1975-04-08 | Frank G Back | Rapid focusing varifocal lens assembly |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4763987A (en) * | 1985-11-20 | 1988-08-16 | Minolta Camera Kabushiki Kaisha | Lens barrel |
US5016993A (en) * | 1987-10-02 | 1991-05-21 | Olympus Optical Company Ltd. | Zoom mechanism for zoom lenses |
Also Published As
Publication number | Publication date |
---|---|
GB2157020B (en) | 1987-05-20 |
DE3510093C2 (en) | 1988-01-14 |
DE3510093A1 (en) | 1985-10-03 |
JPH0222923B2 (en) | 1990-05-22 |
GB8508345D0 (en) | 1985-05-09 |
GB2157020A (en) | 1985-10-16 |
JPS60205518A (en) | 1985-10-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ASAHI KOGAKU KABUSHIKI KAISHA, NO. 36-9, MAENO-CHO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:TAKIZAWA, MORIO;REEL/FRAME:004689/0229 Effective date: 19850225 Owner name: ASAHI KOGAKU KABUSHIKI KAISHA,JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TAKIZAWA, MORIO;REEL/FRAME:004689/0229 Effective date: 19850225 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
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FPAY | Fee payment |
Year of fee payment: 12 |